David Smiley created SOLR-15081:
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Summary: Metrics per core: report leader true/false and replica
state
Key: SOLR-15081
URL: https://issues.apache.org/jira/browse/SOLR-15081
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Components: metrics
Reporter: David Smiley
The core level metrics hold some interesting information, but I don't see
information pertaining to the SolrCloud status of the core. In particular, I'd
like to see the leader status here, and also the replica state. The use-case I
have in mind is enabling the Prometheus Exporter to get the doc count (and
maybe other basics) of only the leader replicas, thereby counting unique
documents instead of a fully replicated figure. This is an approximation to
doing a match-all-docs query on all collections, but is a more sound approach
when one has orders of magnitude more collections than nodes.
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